The word horsewhipping is playable in Words With Friends™, no blanks required. Because it is longer than 7 letters, you would have to play off an existing word or do it in several moves.
Words With Friends™ Letter Score: 29
Highest Scoring Words With Friends™ Play In The Letters horsewhipping
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Seven Letter Word Alert: (66 words)
gophers, heroins, hippies, hoppers, hopping, horsing, ignores, inshore, inspire, ioniser, iphones, ironies, nippers, nippier, noisier, ogreish, origins, phisher, phonier, phonies, pigeons, pigpens, pingers, pingoes, poising, preshow, propine, regions, reshown, ripping, rosehip, shewing, shinier, shipper, shoeing, shopper, shoring, showier, showing, sipping, snipper, snowier, soppier, sopping, spewing, spinier, spiring, sponger, sporing, swiping, swopper, whiners, whinger, whinges, whinier, whipper, whisper, whopper, whorish, wigeons, wingers, wirings, wishing, wispier, wisping, worship